How can I parse JSON string from HttpClient?

Question

I am getting a JSON result by calling an external API.

        HttpClient client = new HttpClient();         client.BaseAddress = new Uri(url);         client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));         HttpResponseMessage response = client.GetAsync(url).Result;          if (response.IsSuccessStatusCode)         {             var result  = response.Content.ReadAsStringAsync().Result;             var s = Newtonsoft.Json.JsonConvert.DeserializeObject(result);             return "Success";         }         else         {             return "Fail";         } 

The result in line var s = Newtonsoft.Json.JsonConvert.DeserializeObject(result); I am getting is like:

 {{   "query": "1",   "topScoringIntent": {     "intent": "1",     "score": 0.9978111,     "actions": [       {         "triggered": false,         "name": "1",         "parameters": []       }     ]   },   "entities": [],   "dialog": {     "prompt": "1",     "parameterName": "1",     "parameterType": "1::1",     "contextId": "11",     "status": "1"   } }} 

I am using HttpClient. I am facing difficulty in accessing prompt key-value. I want to get prompt from dialog. How can I get it?

Answer 1

There are three ways that come to mind.

1. Assuming the json is consistent and the structure of the response will not change frequently, I would use a tool like json2csharp or jsonutils to create c# classes.

   then call:

   {GeneratedClass} obj = JsonConvert.DeserializeObject<{GeneratedClass}>(result); 

   This will give you a strongly typed object that you can use.

2. You can skip the class generation and use a dynamic object:

   dynamic obj = JsonConvert.DeserializeObject<dynamic>(result) 

   and access properties such as:

   obj.dialog.prompt; 

3. You can use a JObject and access its properties using strings

   JObject obj = JsonConvert.DeserializeObject(result);  obj["dialog"]["prompt"]